简讯

近日,雷克沙联合柯达,宣布发布全新柯达SDHC视频存储卡。该卡结合了柯达用户对于雷克沙产品一贯信赖的质量、兼容性．为采用闪存介质的数码摄像机、卡片机．和支持SDHC格式的主机设备．包括柯达Zi6高清便携式摄像机,提供了高清视频拍摄的高性能大容量存储解决方案。该卡目前提供4GB、8GB和16GB三种容量选择,分别可以摄录90分钟、3小时和6小时的高清视频。     

代号“绝密”！三招五式藏文件

几乎每个电脑用户都有一块不希望被他人窥探的私人禁地,比如机密的文件、个人资料存档、私密照片、日记帐簿记录等等。这些不能说的秘密怎样妥善保存才不被外泄呢？最初级的手段是藏身于深层目录,比较专业的方法则是针对不同的需求选择加密或隐藏文件。虽说条条大路通罗马,但方法却有难有易、有繁有简,下面就将为大家介绍几种快捷有效的实用方案。     

Technology for simulating crowd evacuation behaviors

This paper presents a model for simulating crowd evacuation and investigates three widely recognized problems. For the space continuity problem, this paper presents two computation algorithms: one uses grid space to evaluate the coordinates of the obstacle's bounding box and the other employs the geometry rule to establish individual evacuation routes. For the problem of collision, avoidance, and excess among the individuals, this paper computes the generalized force and friction force and then modifies the direction of march to obtain a speed model based on the crowd density and real time speed. For the exit selection problem, this paper establishes a method of selecting the exits by combining the exit's crowd state with the individuals. Finally, a particle system is used to simulate the behavior of crowd evacuation and produces useful test results.     

Web安全网关采购指南—性能篇

从功能的专业性而言,无论是UTM、下一代安全网关还是Web安全网关都能在一定程度上满足金融、电信、医疗、大企业等行业用户的需求,但作为合格的企业级多功能应用安全网关,除了具有全面的功能外,开启所有功能后的性能也是不容忽视的,这也是用户选择多功能安全网关时需要多方面评测的重要指标之一。这就需要用户不仅对各个功能模块的实现技术与原理进行深入研究以辨明安全防御和管控功能的同时,也需要辨明设备架构、操作系统以及扫描处理算法,甚至功能实现技术所带来的性能差异。功能再全面,如果没有良好的性能,那也只能是花架子。本篇主要向大家介绍Web安全网关最重要的选购指标之一：性能。     

彩钢家族新丁--技展彩钢9号机箱

彩钢9号是技展在原有几款彩钢机箱基础上着力突出性价比的一款新品,采用彩钢面板,拥有华丽的外观,在抗磨、抗划伤、耐腐蚀性、防电磁辐射能力等方面均有突出表现。彩钢9号有丹霞红、璀璨金、珍珠白、梦幻银四种颜色供用户选择,前面板布局简练,前置USB和音频接口设计在机箱面板顶部,方便使用。前面板上部设置了三个遮挡式光驱扩展位,用户不用担心机箱与光驱前面板颜色搭配问题。     

找回Win7任务栏的经典功能

新面孔的Windows7操作系统,各种新功能相当丰富,例如脱胎换骨的任务栏便是如此。右击任务栏中的任一程序图标,将显示所谓的“跳转列表（JumpLists）”：最多可以显示10个最近打开的任务,同时还提供了最常用的操作功能供用户选择,可以说是相当的方便。     

无法打印多页码怎么解决

在打印Word文档时如果选择"全部页面一起打印",则会有很多页码打印不出来,打印机本身并没问题,如果是一页一页手动分开打印,就不会出现上述问题。请问该如何解决?     

玩转QQ邮箱签名 工作生活两不误

自从QQ邮箱可以接收其它邮箱的来信,笔者就将工作邮箱挂到了QQ邮箱里,方便使用,不过工作往来的邮件通常都会在签名中留下自己的联系方式,笔者每次除了要选择发信账号外,还得选择一     

巧用SnagIt准确截取界面元素

使用SnagIt截图的朋友,对截图的要求通常比较高,虽然SnagIt具有区域截图功能,不过直接用区域截图截取窗口中的元素或列表时,会因为选择上的误差,带     

Integration control for traffic corridors considering guidance information

The problem of designing integration traffic strategies for traffic corridors with the use of ramp metering, speed limit, and route guidance is considered in this paper. As an improvement to the previous work, the presented approach has the following five features： 1） modeling traffic flow to analyze traffic characteristics under the influence of variable speed limit, on-ramp metering and guidance information; 2） building a hierarchy model to realize the integration design of traffic control and route guidance in traffic corridors; 3） devising a multi-class analytical dynamic traffic assignment （DTA） model for traffic corridors, where not only the route choice process will be different for each user-class, but also the traffic flow operations are user-class specific because the travel time characteristic for each user-class is considered; 4） predicting route choice probabilities adaptively with real-time traffic conditions and route choice behaviors corresponding to variant users, rather than assuming as pre-determined; and 5） suggesting a numerical solution algorithm of the hierarchy model presented in this paper based on the modified algorithm of iterative optimization assignment （IOA）. Preliminary numerical test demonstrates the potential of the developed model and algorithm for integration corridor control.